Improvement in bit-stocks



UNITED STATES PATENT OFFICE.

D. W. GOODELL, OF NORTHAMPTON, MASSACHUSETTS.

lNlPROVElVl ENTi IN BIT-STOCKS.

Specification forming part of Letters Patellis No. 51,173, dated November Q8, 1865.

To all echo-m. Ait may concern:

Beitknown that l, D.\V. GooDELL,ot`North ampton, Hampshire county, Commonwealth ot' illassachnsetts, have inrented certain Improve ments in Bit-Holders forBit-Stocks; and I do herebyr declare that the following' is a t'ull and exact description thereof, reference being had to the accompanying drawings and to letters ot' reference marked thereon.

In the drawings, Figurel shows a ['ull-sized stock with my improved bit-holder attached. Fig. 2 is a cross-section showing the construction ot' the holder. Fig. i is a partial end View, and Fig. Il the same with the cores (c removed.

My invention consists otl an arrangement by which a bit may be. firmly held in al brace or bitA stock, and at the saule time it may be quickly and readily closed and opened so as to hold or release the bit. This l accomplish in the ollowing manner:

I will rst describe the construction. It consisls of four pieces, A B C D, which have projections, Z) c d e which catch into corresponding notches in the bit-shank. lhese pieces are forced inward by the sliding pieces E F G Il, which are moved by the cap K, which has a screw cut iu its interior, the threads of which tit in a similar screw eut on the pieces E F Cr H, and thus by turning,` thc cap the slides E F GH are moved outward, forcing in the pieces A B C I). These are kept outward, when not thus forced in, by a. rubber spring, L.

The operation of this invention is very sim` ple. A `slight motion of the cap K in one direction is sutiicicnt to fasten and in the other to release the bit-shank, as will readily be seen from its construction; and thus l accomplish, in a simple, compact arrangement, and consequently an economical one, all that is desirable in abil-holder, namely: perfect security ot` the bit. while held and ease and quickness in fastening and releasing the saine.

"lhe pieces A B U l) hang on pins 0 oo"0", and have slots s sss, so arranged as to allow these pieces to adjust themselves to the iorm ot' shank introduced.

ln this arrangernentl do not wish to confine in) selt' to the exact munber of piecesA B C l) here used, but a. greater or less number may be used ii' desired; neither is it necessary to t'orm the spring L ot rubber, though more convenient; but

Wha-t1 do claim as new, and desire to secure by Letters Patent, is-

The combination otl one or more pieces, A, B, 83e., with one or more pieces, l". F, &c., spring,- L, cap li, and stock l), when arranged substautiall in the manner and for the pnrpose herein set forth.

I). W. GOODELL.

Witnesses:

J. 15. GARDINER, W. D. STEVENS, W. L. RICHARDSON. 

